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Water Quality Improvement Projects (TMDLs)

WRIA 24: Willapa

The following table lists overview information and links to specific water quality improvement projects (including total maximum daily loads, or TMDLs) for this water resource inventory area (WRIA). Please use links (where available) for more information on a project.



Waterbody Name Pollutant(s) Status** TMDL Lead
Willapa River, Lower


Andrew Kolosseus

Fork Creek
Willapa River
Willapa River
Half Moon Creek
Mill Creek
Fern Creek
Wilson Creek

Temperature EPA approved

Has an implementation plan

Johnson Slough
Below South Bend
Near Raymond Port
At 101 Bridge
Near Ellis Slough
At Willapa Rd.
South Fork

Dissolved Oxygen EPA approved

Has an implementation plan

Willapa River
Unnamed Creek (Central St. drain @ Coast Seafoods)
Riverdale Creek
Wilson Creek
Falls Creek
Fern Creek

Fecal Coliform EPA approved

Has an implementation plan

** Status will be listed as one of the following: Approved by EPA, Under Development or Implementation

For more information about WRIA 24:

* The Department of Ecology and other state resource agencies frequently use a system of 62 "Water Resource Inventory Areas" or "WRIAs" to refer to the state's major watershed basins.


Last updated October 2016